itch.io

This is for the options screen:

screen options():

    title "Options"

    vbox:

        # Check if the current background is the light mode image

        if renpy.defaultbg == "your_light_mode_background_image_filename.png":

            textbutton _("Enable Dark Mode") action EnableDarkMode()

        else:

            textbutton _("Disable Dark Mode") action DisableDarkMode()

        textbutton _("Back") action Return()

    # Add this line to use the dark_mode_bg style

    style "options" box_style "dark_mode_bg"

    add "ui/hud/options_background.png"
This is for the script.rpy or whatever .rpy that starts the game:

init:

    # Set the default background to the light mode background image

    $ renpy.defaultbg = "your_light_mode_background_image_filename.png"

label EnableDarkMode():

    # Set the background to the dark mode background image

    $ renpy.defaultbg = "your_dark_mode_background_image_filename.png"

label DisableDarkMode():

    # Set the background to the light mode background image

    $ renpy.defaultbg = "your_light_mode_background_image_filename.png"
I hope this works lol